403640400403 has 4 divisors (see below), whose sum is σ = 408749772640. Its totient is φ = 398531028168.

The previous prime is 403640400391. The next prime is 403640400409. The reversal of 403640400403 is 304004046304.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-403640400403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (403640400409) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2554686000 + ... + 2554686157.

It is an arithmetic number, because the mean of its divisors is an integer number (102187443160).

Almost surely, 2^403640400403 is an apocalyptic number.

403640400403 is a deficient number, since it is larger than the sum of its proper divisors (5109372237).

403640400403 is an equidigital number, since it uses as much as digits as its factorization.

403640400403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5109372236.

The product of its (nonzero) digits is 13824, while the sum is 28.

Adding to 403640400403 its reverse (304004046304), we get a palindrome (707644446707).

The spelling of 403640400403 in words is "four hundred three billion, six hundred forty million, four hundred thousand, four hundred three".